And one-half to lewis m



Nov. 3,1931. H, MCGOWAN 1,830,120

PRES SER ROLLER Filed Feb. l5, 1930 l YPatented Nov. 3, 119.31Y

PATENT OFFICE UNITED STATES HAR-OLD MCGOWAN, OF CHICAGO, ILLINOIS,ASSIGNOE OF ONE-HALF TO BINDERY SERVICE COIi'IPANY, INC., OF CHICAGO,ILLINOIS, AND ONE-HALF TO LEWIS M. PRYOR .AND MAURICE G. PRYOR, OFCHICAGO, ILLINOIS PRESSE-R ROLLER Application led February 15, 1930.Serial No. 428,807.

This invention relates to improvements in presser rollers for sheetconveying mechanism.

In sheet conveying mechanism, such as that generally employed forfeeding sheets of paper to paper cutters for instance, it has been thepractice to use one or more pairs of rubber rolls of sufhcientresiliency to compensate for varying space requirements due to differentweights of the stock being fed to the cutters or to variations in thenumber of sheets that are fed to the mechanism in superimposed relation.Since the life of the rubber of the rolls is quite limited,necessitating frequent renewals, it is the principal object of thisinvention to provide durable presser rollers for sheet feeding mechanismwhich are self adjusting to accommodate variations in the weight of thestock or in the number of superimposed sheets passing therebetween.

Another object of the invention is to pro* vide a presser roller adaptedto bear against the sheet material, to feed the same, and which ismovable longitudinally and radially to accommodate various thicknessesof the material.

Other objects relate to various features of construction and arrangementof parts which will be apparent from a consideration of the followingspecification and accompanying drawings, wherein; A

Figure 1 is an elevation of two pairs of presser rollers embodying thepresent improvements, mounted on parallel rotatable shafts.

Fig. 2 is a vertical longitudinal section taken axially through one ofthe rollers.

Fig. 3 is an end View of a roller and shaft, looking to the left in Fig.2.

Fig. 4: is a broken sectional view showing the presser rings displacedfrom normal concentric posion to accommodate stock of increasedthickness.

In the drawings 10, 11 are parallel shafts and may be a part of, orassociated with, any suitable feeding mechanism for sheet material, aspaper. The shafts may be drive shafts by means of which the material ismoved to Mountedon the shafts are presser rollers ari ranged in pairs,corresponding rollers of each pair being indicated by the numerals 12,13. Between these rollers the stock `14, such as paper, is moved. Theremay be as many pairs ofrollers as required, two pairs being shown forthe purpose of illustration.

.As shown in Fig. 2, a roller 12, which is identical with roller 18,comprises a hub portion 15 which is secured to the shaft 10 by a pin 16.The hub has a conical face 17 which terminates in a sleeve-likeextension 18 having a flange 19 at its outer end. A presser ring 20,having a cylindrical outer periphery and an inner conical surface 21, ismounted on the hub 15 with the conical faces normally held in contact bya spring 22,one end of which seats against the surface 23 and the otherend of which bears against the flange 19. As illustrated in Fig. 41, asa heavy sheet of stock, or a large number of sheets 14 pass between thepairs of rollers 12, 13, the rings 2() will be forced laterally againstthe action of the springs 22 and will rotate about an axis off-set from`the axes of the respective shafts. This longitudinal and radialmovement of the rings varies in proportion to the thickness of the stockpassing between them. The two rings of each pair move in unison andpress against the stock on opposite sides thereof, and aresimultaneously returned toward normal position by the respective springswhen the thickness of the stock is lessened. The rings will thus be seento be self adjusting to the thickness of the stock being operated on andalways exert a uniform pressure against the stock.

Where the shafts 10, 11 are drive shafts, the springs 22 will besufficiently stiff to prevent rotative movement of the rings 2Orelatively to the hubs 15.

In some forms of sheet feeding mechanism the presser rollers on oneshaft may be employed in conjunction with a conventional long roller ontrie other shaft, the improved presser rollers serving to accommodatestock of different thickness. Other uses and combinations of the presserrollers may suggest themselves to those skilled in the art, and Icutting mechanism or they may be idlers. do not wishto be restricted tothe specific embodiment of the invention herein shown and describedexcept as so limited by the appended claims.

That I claim is:

l. A presser` roller for sheet conveying mechanism comprising arotatable member adapted to be secured to a shaft against axial movementrelatively thereto and having an outer conical face, a presser ringhaving an inner conical face adapted to coact With said first face, anda spring pressing against said ring and tending to cause the conicalface thereof to seat on the conical face of said rotatable member.

2. A presser roller for sheet conveying mechanism comprising a pair ofrotatable members adapted to be mounted on a shaft a spring tending tohold said members normally in concentric relation, one of said membersbeing secured to said shaft against movement axially thereof and theother being movable axially of said shaft against the action of saidspring and ra diallj7 with respect to the other member.

A presser roller for sheet conveying mechanism comprising a memberadapted to be secured to a rotatable shaft against axial movementrelativelyv thereto, said member having an outer conical face and anaxially projecting sleeve portion, a presser ring having an innerconical face complemental to said conical face of said member, an outWardly projecting portion on said sleeve, an d a spring surrounding saidsleeve and confined between said projecting portion thereof and theadjacent Wall of said presser ring and tending to press said ring intoconcentric position on said member.

In Witness whereof I have subscribed my name.

HAROLD MCGOVVAN.

